.slide{max-width:100%;height:auto;margin:0 auto;position:relative;overflow:hidden}.slide ul{width:10000%;list-style-type:none}.next_btn{    position:absolute;width:50px;height:100px;line-height:26px;text-align:center;opacity:.5;vertical-align:middle;    right:5px;top:50%;color:#fff;font-family:arial;font-size:60px;font-weight:700;    display:inline-block;cursor:pointer;font-family:宋体;    transform: translateY(-50%);}.prev_btn{    position:absolute;width:50px;height:100px;line-height:26px;text-align:center;opacity:.9;vertical-align:middle;    left:5px;top:50%;color:#fff;font-family:宋体;font-size:60px;font-weight:700;    display:inline-block;cursor:pointer;font-family:宋体;    transform: translateY(-50%);}.slide ul:after{    content:'';clear:both;display:block}.slide ul li{    float:left;text-align:center}.slide ul li img{    vertical-align:middle;    width:100%;    /*max-height: 600px;*/}.slide .circle_btn{    position:absolute;bottom:15px;text-align:center;left:0;display:table;margin:0 auto;width:100%}.slide .circle_btn button{    box-sizing:content-box;opacity:.8;outline:0;border:0;padding:2px 18px;background:rgba(255,255,255,.2);    margin:2px 5px;overflow:hidden;transition:all .6s;cursor:pointer}.slide .circle_btn button.active{    background:rgba(167,167,167,.8)}